A novel Dawson-like cerium(IV)-hybridizing selenotungstate Na13H7[Ce(SeW17O59)2]center dot 31H(2)O

作者：Li, Hailou; Yang, Wen; Chai, Yun^*; Chen, Lijuan; Zhao, Junwei

来源：Inorganic Chemistry Communications, 2015, 56: 35-40.

DOI：10.1016/j.inoche.2015.03.012

• Polyoxometalate
• Selenotungstate
• Dawson-like polyoxoanion
• Electrochemistry

A novel cerium(IV)-hybridizing selenotungstate with Dawson-like structure Na13H7[Ce(SeW17O59)(2)]center dot 31H(2)O (1) has been synthesized by reaction of Na2WO4 center dot 2H(2)O, Na2SeO3 and (NR4)(2)Ce(NO3)6 in the aqueous solution and characterized by elemental analysis, IR spectrum, UV spectrum, thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. To the best of our knowledge, 1 stands for 1:2-type Dawson-like selenotungstate constructed from two identical SeE17O59](12-) moieties combined via one Ce4+ ion. The Ce4+ cation displays a distorted square prismatic geometry defined by eight oxygen atoms from two [SeW17O59](12-) moieties. In the [Ce(SeW17O59)(2)](20-) polyoxoanion, the (SeO3} trigonal pyramid encapsulated into the [SeW17O59](12-) fragment is situated on the side close to the Ce4+ ion. The TGA curve of 1 reveals two steps of weight loss between 25 degrees C and 700 degrees C. Furthermore, the electrochemical and the electrocatalytic properties of 1 have been measured by cyclic voltammetry (CV) in 0.5 M Na2SO4 + H2SO4 aqueous solution.

• 出版日期2015-6
• 单位河南大学